port instance_actions and server_list tests into nova v3 part1

Partially implements blueprint nova-v3-api-tests

Change-Id: Ibcf885550965b59f63e4181c9f6ccc1b96ae8c09
port instance_actions and server_list tests into nova v3 part2

Partially implements blueprint nova-v3-api-tests

Change-Id: I9b78306da77c50fa56cb702c4b712398908b923a
Make sure ssh retries on paramiko.SSHException

We are occasionally seeing paramiko raise a SSHException which is
causing tempest to fail out, but on a constrained devstack environment
its possible that there are network or other performance issues, so we
want to keep retrying on an SSHException just like we retry on a
paramiko.AuthenticationException.

Attempt at Closes-Bug: #1253896

Change-Id: I4293f9a47a6d524ced0d09eb67a52c5ed1ad361e
Cleanup using about the data_utils module and functions

 HACKING officially discourages symbol import directly because it makes
it harder to track down that a function was imported. Recently, we keep
this rule but there are many code that don't keep it.
 This commit cleanups them.

Change-Id: Ibda1a5e424280bad8535ee27f66dec99bf68f676
Merge "Cleanup using about the data_utils module and functions"
Merge "port instance_actions and server_list tests into nova v3 part1"
Merge "port instance_actions and server_list tests into nova v3 part2"
Merge "Make sure ssh retries on paramiko.SSHException"